Final answer:
Dunmore's Proclamation did attract slaves, approximately 300 of whom joined the British in the Ethiopian Regiment, hoping for freedom. However, the claim that it resulted in a majority of enslaved people in the colonies winning their freedom is incorrect, as it was both logistically challenging for many slaves to escape and legally limited.
Step-by-step explanation:
Dunmore's Proclamation, issued in November 1775 by the British colonial governor of Virginia, indeed attracted slaves to join the British forces. This proclamation promised freedom to slaves who belonged to rebels and were willing to serve the British cause. African Americans responded to this call for freedom, with roughly 300 slaves joining Dunmore's "Ethiopian" regiment. However, not all results of the proclamation were equally transformative. While the slaves did seek their freedom through the British, the proclamation did not grant a majority of enslaved people in the colonies their freedom, as it was difficult for many to escape and because the offer was limited to those in the rebellious areas.
The proclamation had significant impacts beyond just attracting slaves; it also intensified Patriot fears of a rebellion and increased their commitment to independence. Both slaveholding and non-slaveholding White people feared the potential for a large-scale slave rebellion. Contrary to galvanizing slaves across all the colonies, Dunmore's Proclamation galvanized Patriot resistance against Britain and fostered a deeper commitment toward the revolutionary cause.
Given the context, the incorrect option among the given choices is B. A majority of enslaved people in the colonies won their freedom. Although the proclamation promised freedom, the practicalities of the time, the responses of the Patriots, and the limitations of the proclamation's application meant that the majority of enslaved individuals remained in bondage.